I am trying to fit a growth mixture model to a set of trajectory data. I am using a model that on a generic level is the same as this one.
I do understand how the latent intercept, linear, and quadratic variables are determined. However, I do not understand how the latent class variable is determined. Do I have to assign cases manually to different classes (as if I were doing a multi-group analysis when doing Structural Equation Modeling) or is there some automatic way of assigning cases to the classes? If so, how does this work?